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The library supports Objective-C and Swift, iOS and macOS. You can connect to your remote MySQL database using OHMySQL API. It allows you doing queries in easy and object-oriented way. Common queries such as SELECT, INSERT, DELETE, JOIN are wrapped by Objective-C code and you don’t need to dive into MySQL C API.

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If you are interested in and want to know how it can be applied in your project too.


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  • [x] Easy to integrate and use
  • [x] Many functionality features
  • [x] Requires minimal knowledge in SQL
  • [x] Supports iOS and macOS
  • [x] Clean code with unit tests
  • [x] Complete documentation and support


  • iOS 14.0+ / macOS 11.0+ (for more previous versions use 2.1.3)
  • Xcode 12.0+

How To Get Started


You can use CocoaPods. Add the following line to your Podfile:

pod 'OHMySQL'

If you are using Swift do not forget to add use_frameworks! at the top of Podfile. Add platform, example platform :osx, '11.0'.


Connect to the database.

OHMySQLUser *user = [[OHMySQLUser alloc] initWithUserName:@"root"
OHMySQLStoreCoordinator *coordinator = [[OHMySQLStoreCoordinator alloc] initWithUser:user];
[coordinator connect];
let user = OHMySQLUser(userName: "root", password: "root", serverName: "localhost", dbName: "ohmysql", port: 3306, socket: "/Applications/MAMP/tmp/mysql/mysql.sock")
let coordinator = OHMySQLStoreCoordinator(user: user!)
coordinator.encoding = .UTF8MB4

To end a connection:

[coordinator disconnect];

Query Context

To execute a query you have to create the context:

OHMySQLQueryContext *queryContext = [OHMySQLQueryContext new];
queryContext.storeCoordinator = coordinator;
let context = OHMySQLQueryContext()
context.storeCoordinator = coordinator

You will use this context to execute queries or manipulate the objects.

Execute Query

NSString *dropQueryString = @"DROP TABLE `MyTable`";
OHMySQLQueryRequest *dropQueryRequest =[[OHMySQLQueryRequest alloc] initWithQueryString:dropQueryString];

NSError *error;
[self.mainQueryContext executeQueryRequest:dropQueryRequest error:&error];
let dropQueryString = "DROP TABLE `MyTable`"
let dropQueryRequest =OHMySQLQueryRequest(queryString: dropQueryString)
try? self.mainQueryContext.execute(dropQueryRequest)


The response contains array of dictionaries (like JSON).

OHMySQLQueryRequest *query = [OHMySQLQueryRequestFactory SELECT:@"tasks" condition:nil];
NSError *error = nil;
NSArray *tasks = [queryContext executeQueryRequestAndFetchResult:query error:&error];
let query = OHMySQLQueryRequestFactory.select("tasks", condition: nil)
let response = try? OHMySQLContainer.shared.mainQueryContext?.executeQueryRequestAndFetchResult(query)

You will get a response like this:

[{ @"id": @1, @"name": @"Task name", @"description": @"Task description", @"status": [NSNull null] }]


OHMySQLQueryRequest *query = [OHMySQLQueryRequestFactory INSERT:@"tasks" set:@{ @"name": @"Something", @"desctiption": @"new task" }];
NSError error;
[queryContext executeQueryRequest:query error:&error];
let query = OHMySQLQueryRequestFactory.insert("tasks", set: ["name": "Something", "desctiption": "new task"])
try? mainQueryContext?.execute(query)


OHMySQLQueryRequest *query = [OHMySQLQueryRequestFactory UPDATE:@"tasks" set:@{ @"name": @"Something", @"description": @"new task update" } condition:@"id=5"];
NSError error;
[queryContext executeQueryRequest:query error:&error];
let query = OHMySQLQueryRequestFactory.update("tasks", set: ["name": "Something"], condition: "id=7")
try? mainQueryContext?.execute(query)


OHMySQLQueryRequest *query = [OHMySQLQueryRequestFactory DELETE:@"tasks" condition:@"id=10"];
NSError error;
[queryContext executeQueryRequest:query error:&error];
let query = OHMySQLQueryRequestFactory.delete("tasks", condition: "id=10")
try? mainQueryContext?.execute(query)


The response contains array of dictionaries (like JSON). You can do 4 types of joins (INNER, RIGHT, LEFT, FULL) using string constants.

OHMySQLQueryRequest *query = [OHMySQLQueryRequestFactory JOINType:OHJoinInner                                                   fromTable:@"tasks"
                              columnNames:@[@"id", @"name", @"description"]
                               joinOn:@{ @"subtasks":@"tasks.id=subtasks.parentId" }];
NSArray *results = [queryContext executeQueryRequestAndFetchResult:query error:nil];
let query = OHMySQLQueryRequestFactory.joinType(OHJoinInner, fromTable: "tasks", columnNames: ["id", "name", "description"], joinOn: ["subtasks": "tasks.id=subtasks.parentId"])
let result = try? mainQueryContext?.executeQueryRequestAndFetchResult(query)

Object Mapping

You have to implement the protocol OHMappingProtocol for your models. Insertion looks like the following (in this example the NSManagedObject instance). The library has only a primary logic for mapping, so I would recommend you writing a mapping logic by yourself. If you are using Swift you cannot use fundamental number types (Int, Double), only NSNumber (due to run-time).

[queryContext insertObject:task];
BOOL result = [queryContext save:nil];
try? mainQueryContext?.save()

You can update/delete the objects easily.

// You don't need to specify primary index here.  It'll be update for you.
OHTask *task = [OHTask new];
task.name = @"Code cleanup";
task.taskDescription = @"Delete unused classes and files";
task.status = 0;
[queryContext updateObject:task];
task.name = @"Something";
task.status = 1;
[task update];
[queryContext deleteObject:task];
BOOL result = [queryContext save:nil];
let task = Task()
task.name = "sample"

try? mainQueryContext?.save()




OHMySQL is released under the MIT license. See LICENSE for details.